Description: Third generation free replacement from Trek. Started as 2100. Bonding between carbon seat tube and aluminum bottom bracket failed. Frame was replaced once with like 2100, then Trek replaced with Aluminum 2300 in 2005. That frame failed in 2010 (bottom bracket to down tube) and was replaced with 2.3. Mostly Dura Ace except crank, bb, and rear hub (all Ultegra). Mavic Open Pro wheels for weekdays, Mavic Ksyrium SSL for weekends.